<!DOCTYPE html>
<html>
  <body>
    <form>
      Required: <input type="text" name="name" required><br>
      Email : <input type="email" name="email"><br>
      URL : <input type="url" name="email"><br>
      Number(18-99): <input type="number" size="6" name="age" min="18" max="99"><br>
      Pattern(MM/DD/YYYY): <input type="text" pattern="\d{1,2}/\d{1,2}/\d{4}"><br>
      Length(10-20): <input minlength="10" maxlength="20"><br>
      Length(10-20): <textarea required minlength="10" maxlength="20"></textarea><br>
      Step(3.11)<input type="number" min="0" step="3.11"><br>
      Required Select: <select required>
        <option></option>
        <option value="0">A</option>
        <option value="1">B</option>
        <option value="2">C</option>
      </select><br>
      Required Radio: <input type="radio" name="group1" value="1" required>1
      <input type="radio" name="group1" value="2">2
      <input type="radio" name="group1" value="3">3<br>
      Required Checkbox: <input type="checkbox" name="group2" value="1" required>1
      <input type="checkbox" name="group2" value="2">2
      <input type="checkbox" name="group2" value="3">3<br>
      Required File: <input type="file" required><br>
      <input type="submit">
    </form>
  </body>
</html>
